Vaxart (VXRT) Short Interest Ratio & Short Volume $0.38 0.00 (-0.11%) As of 09/5/2025 03:59 PM Eastern Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Vaxart Short Interest DataVaxart (VXRT) has a short interest of 7.46 million shares. This marks a -7.26% decrease in short interest from the previous month. The short interest ratio (days to cover) is 7.1, indicating that it would take 7.1 days of the average trading volume of 2.85 million shares to cover all short positions.Current Short Interest7,462,800 sharesPrevious Short Interest8,047,000 sharesChange Vs. Previous Month-7.26%Dollar Volume Sold Short$2.73 millionShort Interest Ratio7.1 Days to CoverLast Record DateAugust 15, 2025Outstanding Shares228,940,000 sharesPercentage of Shares Shorted3.26%Today's Trading Volume712,844 sharesAverage Trading Volume2,853,669 sharesToday's Volume Vs. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartVXRT Short Interest Over TimeVXRT Days to Cover Over TimeVXRT Percentage of Float Shorted Over Time Vaxart Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 8/15/20257,462,800 shares $2.73 million -7.3%N/A7.1 $0.37 7/31/20258,047,000 shares $2.87 million -8.3%3.6%3.5 $0.36 7/15/20258,770,700 shares $3.27 million -48.3%N/A0.8 $0.37 6/30/2025829,000 shares $374.71 thousand -96.1%0.4%1.4 $0.45 6/15/202521,170,000 shares $14.86 million +44.2%9.5%5.1 $0.70 5/31/202514,680,000 shares $6.41 million +2.3%6.6%8.2 $0.44 5/15/202514,350,000 shares $6.09 million +19.1%6.5%7.1 $0.42 4/30/202512,050,000 shares $5.30 million -8.4%N/A6.4 $0.44 4/15/202513,160,000 shares $4.68 million +1.9%5.9%7.4 $0.36 3/31/202512,920,000 shares $5.30 million +5.6%5.8%6.6 $0.41 Get the Latest News and Ratings for VXRT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Vaxart and its competitors with MarketBeat's FREE daily newsletter. 3/15/202512,230,000 shares $6.59 million -7.9%5.5%6.1 $0.54 2/28/202513,280,000 shares $6.76 million +17.0%6.0%6.8 $0.51 2/15/202511,350,000 shares $8.47 million +2.2%5.1%6.1 $0.75 1/31/202511,110,000 shares $7.55 million -4.4%N/A6.2 $0.68 1/15/202511,620,000 shares $8.62 million +0.4%N/A6.6 $0.74 12/31/202411,580,000 shares $7.67 million +2.6%N/A6.8 $0.66 12/15/202411,290,000 shares $6.68 million +0.9%N/A8.6 $0.59 11/30/202411,190,000 shares $6.74 million -2.4%N/A8.2 $0.60 11/15/202411,460,000 shares $6.65 million +1.7%N/A8.2 $0.58 10/31/202411,270,000 shares $8.62 million -3.9%N/A6.4 $0.77 10/15/202411,730,000 shares $9.22 million -2.8%N/A6.4 $0.79 9/30/202412,070,000 shares $10.25 million -4.5%N/A6 $0.85 9/15/202412,640,000 shares $12.48 million -0.9%N/A5.5 $0.99 8/31/202412,750,000 shares $11.05 million -5.7%N/A2.8 $0.87 8/15/202413,520,000 shares $10.05 million +11.9%N/A3.1 $0.74 7/31/202412,080,000 shares $8.11 million -2.4%N/A3 $0.67 7/15/202412,380,000 shares $8.38 million -11.2%N/A3.1 $0.68 6/30/202413,940,000 shares $9.30 million -30.3%N/A3.6 $0.67 6/15/202419,996,900 shares $11.45 million +5.8%N/A5.1 $0.57 5/31/202418,910,000 shares $15.41 million +1.7%N/A12.9 $0.82 5/15/202418,600,000 shares $17.57 million +0.7%N/A11.6 $0.94 4/30/202418,470,000 shares $13.20 million +0.7%N/A11.3 $0.71 4/15/202418,340,000 shares $16.67 million +6.7%N/A9.6 $0.91 3/31/202417,190,000 shares $22.35 million +10.1%N/A8.2 $1.30 3/15/202415,610,000 shares $16.86 million +13.9%N/A8 $1.08 2/29/202413,710,000 shares $16.73 million +8.2%N/A7.6 $1.22 2/15/202412,670,000 shares $14.95 million +14.0%N/A7.6 $1.18 1/31/202411,110,000 shares $13.11 million -3.2%N/A7.9 $1.18 1/15/202411,480,000 shares $6.43 million -2.6%N/A11 $0.56 12/31/202311,790,000 shares $6.75 million +4.1%N/A16.4 $0.57 12/15/202311,330,000 shares $7.17 million -3.4%N/A16.8 $0.63 11/30/202311,730,000 shares $8.39 million -6.7%N/A18.2 $0.72 11/15/202312,570,000 shares $10.68 million -11.1%N/A17.8 $0.85 10/31/202314,140,000 shares $9.34 million -13.7%N/A16.7 $0.66 10/15/202316,380,000 shares $10.89 million -3.0%N/A19 $0.67 9/30/202316,880,000 shares $12.73 million +1.7%N/A18.4 $0.75 9/15/202316,600,000 shares $11.76 million +0.8%N/A14.6 $0.71 8/31/202316,470,000 shares $13.55 million -3.1%N/A9.8 $0.82 8/15/202316,990,000 shares $11.85 million -8.7%N/A8.2 $0.70 7/31/202318,610,000 shares $15.23 million +8.3%N/A8.1 $0.82 7/15/202317,190,000 shares $13.24 million -1.0%N/A7.4 $0.77 6/30/202317,370,000 shares $12.68 million -19.8%N/A7.4 $0.73 6/15/202321,660,000 shares $18.89 million +3.4%N/A9.6 $0.87 5/31/202320,950,000 shares $25.56 million +12.0%N/A11.7 $1.22 5/15/202318,710,000 shares $25.63 million -1.3%N/A12.3 $1.37 4/30/202318,960,000 shares $15.42 million -6.9%N/A15.3 $0.81 4/15/202320,370,000 shares $13.38 million +0.9%N/A15.2 $0.66 3/31/202320,180,000 shares $15.27 million -6.7%N/A13.3 $0.76 3/15/202321,630,000 shares $16.44 million -2.3%N/A11.9 $0.76 2/28/202322,140,000 shares $17.26 million +1.5%N/A8.4 $0.78 2/15/202321,810,000 shares $21.31 million -1.0%N/A7.9 $0.98 1/31/202322,030,000 shares $23.79 million -0.9%N/A6.9 $1.08 1/15/202322,240,000 shares $26.02 million -2.3%N/A6.5 $1.17 12/30/202222,760,000 shares $21.87 million -4.0%N/A6.4 $0.96 12/15/202223,710,000 shares $26.32 million -3.0%N/A6.6 $1.11 11/30/202224,440,000 shares $28.84 million -0.8%N/A7.9 $1.18 11/15/202224,640,000 shares $39.18 million +2.5%N/A8.1 $1.59 10/31/202224,030,000 shares $40.13 million -1.9%N/A8.3 $1.67 10/15/202224,500,000 shares $41.65 million -4.0%N/A8.8 $1.70 9/30/202225,510,000 shares $55.61 million +6.3%N/A9.3 $2.18 9/15/202224,000,000 shares $66.24 million +3.8%N/A9.2 $2.76 8/31/202223,130,000 shares $71.70 million -0.3%N/A8.8 $3.10 8/15/202223,200,000 shares $100.92 million -2.8%N/A9 $4.35 7/31/202223,860,000 shares $87.80 million +7.8%N/A8.4 $3.68 7/15/202222,130,000 shares $94.50 million -2.0%N/A7.8 $4.27 6/30/202222,580,000 shares $79.03 million -2.8%N/A8.2 $3.50 6/15/202223,230,000 shares $67.83 million +2.1%N/A8.4 $2.92 5/31/202222,760,000 shares $82.85 million -2.1%N/A8.7 $3.64 5/15/202223,240,000 shares $77.62 million -0.4%N/A8.7 $3.34 4/30/202223,340,000 shares $81.22 million +3.1%N/A9.5 $3.48 4/15/202222,650,000 shares $105.55 million +2.0%N/A9.5 $4.66 3/31/202222,210,000 shares $111.94 million -4.7%N/A8.9 $5.04 3/15/202223,310,000 shares $103.96 million -2.4%N/A8.6 $4.46 2/28/202223,890,000 shares $121.36 million +1.3%N/A8.2 $5.08 2/15/202223,580,000 shares $119.55 million +3.9%N/A7.3 $5.07 1/31/202222,690,000 shares $112.32 million +1.7%N/A6.8 $4.95 1/15/202222,310,000 shares $130.96 million -1.8%N/A6.5 $5.87 12/31/202122,720,000 shares $142.45 million +7.8%N/A6.6 $6.27 12/15/202121,070,000 shares $136.74 million +3.7%N/A5.5 $6.49 11/30/202120,310,000 shares $161.67 million -0.9%N/A5.5 $7.96 11/15/202120,500,000 shares $138.38 million +3.4%N/A6 $6.75 10/29/202119,820,000 shares $132.99 million -7.3%N/A4.9 $6.71 10/15/202121,370,000 shares $148.31 million +13.3%N/A3.6 $6.94 9/30/202118,860,000 shares $149.94 million +16.1%N/A2.9 $7.95 9/15/202116,240,000 shares $133.01 million -6.6%N/A2.3 $8.19 8/31/202117,390,000 shares $155.64 million -14.6%N/A1.8 $8.95 8/13/202120,350,000 shares $176.03 million -4.6%N/A2 $8.65 7/30/202121,330,000 shares $153.36 million -14.2%N/A2.1 $7.19 7/15/202124,860,000 shares $174.52 million +4.8%N/A1.3 $7.02 6/30/202123,720,000 shares $177.66 million -1.8%N/A1.2 $7.49 6/15/202124,150,000 shares $188.61 million +0.9%N/A1.3 $7.81 5/28/202123,930,000 shares $158.42 million -7.2%N/A1.5 $6.62 5/14/202125,780,000 shares $162.41 million +3.7%N/A1.6 $6.30 4/30/202124,850,000 shares $228.87 million -3.0%N/A1.4 $9.21 4/15/202125,610,000 shares $140.34 million +7.2%N/A1.9 $5.48 3/31/202123,890,000 shares $138.32 million -7.4%N/A1.7 $5.79 3/15/202125,800,000 shares $173.89 million -1.3%N/A1.8 $6.74 2/26/202126,130,000 shares $195.98 million -5.0%N/A1.8 $7.50 2/12/202127,510,000 shares $238.24 million -10.3%N/A1.8 $8.66 1/29/202130,670,000 shares $273.58 million -7.7%N/A1.8 $8.92 1/15/202133,240,000 shares $243.98 million -0.9%N/A3.3 $7.34 12/31/202033,550,000 shares $200.63 million +19.8%N/A3.3 $5.98 12/15/202028,000,000 shares $216.02 million -4.1%N/A0 $7.72 11/30/202029,200,000 shares $205.28 million -8.8%N/A1.7 $7.03 10/30/202032,350,000 shares $171.46 million +21.1%N/A1.9 $5.30 10/15/202026,720,000 shares $184.37 million +7.9%N/A1.4 $6.90 9/30/202024,770,000 shares $164.72 million +42.1%N/A1 $6.65 9/15/202017,430,000 shares $113.30 million +29.8%N/A0.5 $6.50 VXRT Short Interest - Frequently Asked Questions What is Vaxart's current short interest? Short interest is the volume of Vaxart shares that have been sold short but have not yet been covered or closed out. As of August 15th, investors have sold 7,462,800 shares of VXRT short. Learn More on Vaxart's current short interest. What is a good short interest ratio for Vaxart? The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. VXRT shares currently have a short interest ratio of 7.0. Learn More on Vaxart's short interest ratio. Which institutional investors are shorting Vaxart? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Vaxart: Group One Trading LLC, and Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Vaxart's short interest increasing or decreasing? Vaxart saw a decrease in short interest during the month of August. As of August 15th, there was short interest totaling 7,462,800 shares, a decrease of 7.3% from the previous total of 8,047,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment. How does Vaxart's short interest compare to its competitors? Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Vaxart: Rocket Pharmaceuticals, Inc. (10.87%), Fulcrum Therapeutics, Inc. (10.76%), Abeona Therapeutics Inc. (19.32%), Aldeyra Therapeutics, Inc. (8.33%), Astria Therapeutics, Inc. (6.49%), Benitec Biopharma Limited (5.30%), ADC Therapeutics SA (4.01%), I-Mab Sponsored ADR (2.69%), Altimmune, Inc. (28.85%), CytomX Therapeutics, Inc. (15.24%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Lucid Group, Inc. ($8.00 billion), Spotify Technology ($5.48 billion), AppLovin Corporation ($5.11 billion), Reddit Inc. ($5.02 billion), Coinbase Global, Inc. ($3.99 billion), Charter Communications, Inc. ($3.89 billion), Live Nation Entertainment, Inc. ($3.18 billion), Seagate Technology Holdings PLC ($2.59 billion), ResMed Inc. ($2.55 billion), and Rocket Lab Corporation ($2.52 billion). View all of the most shorted stocks. What does it mean to sell short Vaxart stock? Short selling VXRT is an investing strategy that aims to generate trading profit from Vaxart as its price is falling. VXRT shares are trading down $0.00 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit. How does a short squeeze work against Vaxart? A short squeeze for Vaxart occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of VXRT, which in turn drives the price of the stock up even further. How often is Vaxart's short interest reported? Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including VXRT, twice per month. The most recent reporting period available is August, 15 2025. 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